Cross-Ring connections between the ATCA FPGAs that do not have Ring Up and Ring Down connections between them. This connection type has a lower bandwidth than Ring Up/Down connections.

DRAM

dynamic random access memory—A form of random access memory (RAM). Each bit of information is stored as a charge on a capacitor. This charge must be regularly refreshed to maintain the charge (performed every few milliseconds).

field-programmable gate array—Fundamentally, an FPGA is a semi-conductor device that contains a large quantity of gates (logic devices), which are not interconnected, and whose function is determined by a wiring list, which is downloaded to the FPGA. The wiring list determines how the gates are interconnected, and this interconnection is performed dynamically by turning semiconductor switches on or off to enable the different connections.